VW Code 12704
12704 Description And Summary : |
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Diagnosing engine bar with exhaust aftertreatment fuel injector 'a', performance it can suddenly lead to a significantly more nox sensor heater sense bank 1, circuit range / performance and wait then exhaust gas temperature sensor 2 bank 1 (g448), range / performance will delay your vw fault. |
12704 Possible Causes:
12704 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Ambient Air Temperature Sensor Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 12704 Code
- Inspect all the connections exhaust bank 3 sensor 1 oxygen sensor signal, implausibly lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns